A son wants to fuck his mother in front of him rather than AV, and a mother goes crazy with her son's hard cock while watching AV. One of my son's favorite AVs broke the parent-child relationship... However, in some ways, that same AV also made parents and children happy. While watching the AV, saying "for education..." stimulated the mother and child's instincts, causing the mother to become a female and the child to become a male.
